This is a vintage Temp Sensor by BWD, model WT653, made of brass for engine compartment placement. It has a screw-in mounting style with 2 wire quantity and a mini-blade terminal type. The sensor is a temperature sensor with a black connector and includes a gasket. It is a direct fit part manufactured in the United States, with the interchange part number TS6677.
Don't buy nothing from these people they're selling parts that are not even close to being right. The item on the right is supposedly the replacement part for the one on the left!